Improved bolt-machine



` UNITED STATES PATENT EFICE.

` JOHN R. ABBE, OF PROVIDENCE, RHODE ISLAND.

IMPROVED BOLT-MACHINE.

Specication forming part of Letters Patent No. 100,58 l, dated March 8, 1870; antedated March 1, 1870.

To a/ZZ whom it may concern,.-

Be it known that I, JOHN It. ABBE, of the A city and county of Providence, in the State of Rhode Island, have invented an Improved Bolt-Machine, of which the following is afull, clear, and exact description, reference being had lto the accompanying drawings, forming part of this specification, and in which- Figure l represents a plan or top View of a machine constructedaccording to my in `simplicity and cheapness of construction and positive action in all its parts; and it consists in a combination of sliding anvils or squeezers, operating simultaneously, in pairs, to form the edges of the head, and are upset to form its upper side; also, in a novel arrangement of mechanism for operating said anvils.

Referring to the drawings, A represents the frame or bed of the machine, carrying at its one end a double-crankshaft, B, mounted in suitable pillow-blocks, C, and arranged transversely of the bed. On the outer end of this shaft is a bandswheel or other gear, D, through which the machine is operated by steam or other power. This band-wheel may, if desired, be connected with the shaft by a clutch, to facilitate the stopping and starting of the machine. On the central portion of the bed,longi `tudinally arranged, are guides a, forming a dovetail groove, in which is fitted the carrier b of the anvil c, so as to be capable of slid-` ing therein. This carrier extends upward about double the height of the guides a, and has formed longitudinally in its upper side a dovetail groove, in which the carrier d of the anvil e is fitted to slide. These two carriers b and d are connected with and operated by thel double crank f f by adjustable pitmen The cranks, being on opposite sides of the axis of the shaft B, will, when rotated, cause the carriers to move in opposite directions, and consequently their respective lanvils or dies c and e will alternately approach and recede from each other, and thus form the two opposite edges of the head, the other two edges being formed by dies h 71.', attached to carriers t' i', which have a sliding motion in guides 7o toward and from each other, transthe elbow-lever p, which, together with theupset, are .supported in a suitable frame, E, erected on the bed'A at the opposite end from the crank-shaft B.

q is a fixed but adjustable die, forming, with the die q', attached to the togglelever r, a gripper for holding the rod while the head is being formed. This toggle may be operated to hold or release the bolt, either by the hand-lever s or a foot-lever, through its link-connection s.

A screw, G, is supported in a bracket, o, on the'under side ofthe bed, vertically under the upset die n, which may loe adjusted up or down to regulate the length of the bolt to be headed.

It will be obvious that the dies or anvils c e h h may be detachably connected with their respective carriers, so as to admit of their being' changed for others of different forms. For instance,.if it were ldesired to make a head of hexagonal form, the fiat-faced dies h h must be removed, to give place to others of a V shape, which, together with the straight dies c e, would give the form required.

What I claim, and desire to secure by Letters Patent, is-

1. The combination of the longitudinal and transverse anvil or die carriers b d t' i', arranged and operating substantially as shown and described.

2. The upset a, in combination with the anvils c e h h', when arranged and operated inthe manner set forth.

3. The arrangement of the levers Z Z', links m m, die-carrier b, and transverse carrierst'z', substantially as described.

Witnesses: 4JOI'IN R. ABBE.

FRANcIs B. PERRY, GEORGE H. BURNEAM. 

